HD 2638 b

HD 2638 b
Exoplanet List of exoplanets
Parent star
Star HD 2638
Constellation Cetus
Right ascension (α) 00h 29m 59.873s[1]
Declination (δ) –05° 45′ 50.40″[1]
Distance160 ± 10[1] ly
(50 ± 4[1] pc)
Spectral type G5V
Orbital elements
Semi-major axis(a) 0.044 AU
Eccentricity (e) 0
Orbital period(P) 3.4442 ± 0.0002 d
Argument of
periastron		 (ω) 0°
Time of periastron (T0) 2,453,323.206
± 0.002 JD
Semi-amplitude (K) 67.4 ± 0.4 m/s
Physical characteristics
Mass(m)>0.48 MJ
Discovery information
Discovery date 2005
Discoverer(s) Moutou, Mayor,
Bouchy et al.
Discovery method Radial velocity
Discovery site Geneva
Discovery status Published

HD 2638 b is a planet of the star HD 2638. It is a typical "hot Jupiter", a planet that orbits its parent star in a very tight "torch orbit". Distance to the star is less than 1/20th Earth's distance from the Sun. One orbital revolution lasts only about three and half days.[2]

References

  1. 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. ↑ Moutou, C.; et al. (2005). "The HARPS search for southern extra-solar planets IV. Three close-in planets around HD 2638, HD 27894 and HD 63454". Astronomy and Astrophysics. 439 (1): 367–373. arXiv:1411.7048. Bibcode:2005A&A...439..367M. doi:10.1051/0004-6361:20052826.

Coordinates: 00h 29m 59.87s, −05° 45′ 50.41″


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